At a symposium , 20 % of the professors are psychologists , 60% are biologists , and the remaining 12 professors are economists . If 20 of the professors were glasses , what present of the professors do not wear glasses ?
Created: 5 years ago |
Updated: 3 years ago
best des
ধরি, মোট Professor এর সংখ্য x
x - 20x/100 - 6x/100 = 12
x - x/5 - 3x/5 = 12
5x - x - 3x /5 = 12
x = 60
number of professors do not wear glasses = ( 60 - 20) = 40
required percentage ( 40/60 × 100) % = 66 2/3 %
Md Azizur Rahman
Founder of Satt
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